• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method and system for controlling a multi-pump equipment (1) for pumping a fluid. The equipment comprises n pumping cells (Ci) connected in parallel, with n greater than or equal to 2. The equipment is controlled from a differential pressure setpoint. The method consists in: Determining by estimation an estimated pressure differential (dPpumpi) generated by each pumping cell (Ci) taking into account a quadratic correction value (HEGi) representative of the pressure losses in the pumping cell, Determine by estimating a pressure differential (dPSys) of the multi-pump equipment from the estimated pressure differentials for each pumping cell, comparing said estimated differential pressure (dPSys) of the multi-pump equipment with the pressure differential ( dPsp) to control the reference speed (Wref) to be injected into a control loop of the multi-pump equipment.
    公开号:FR3058479A1
    申请号:FR1660760
    申请日:2016-11-08
    公开日:2018-05-11
    发明作者:Sylvain COIN
    申请人:Schneider Toshiba Inverter Europe SAS；
    IPC主号:
    专利说明:

    Holder (s): SCHNEIDER TOSHIBA INVERTER EUROPE SAS Simplified joint-stock company.
    Extension request (s)
    Agent (s): SCHNEIDER ELECTRIC INDUSTRIES SAS.
    METHOD AND SYSTEM FOR CONTROLLING MULTI-PUMP EQUIPMENT.
    FR 3 058 479 - A1 (5 /) The invention relates to a method and system for controlling a multi-pump equipment (1) intended to pump a fluid. The equipment comprises n pumping cells (Ci) connected in parallel, with n greater than or equal to 2. The equipment is controlled from a pressure differential setpoint. The method consists in: Determining by estimation an estimated pressure differential (dPpumpi) generated by each pumping cell (Ci) taking into account a quadratic correction value (HEGi) representative of the pressure losses in the pumping cell,
    Determine by estimation a pressure differential (dPSys) of the multi-pump equipment from the pressure differentials estimated for each pumping cell,
    Compare said estimated pressure differential (dPSys) of the multi-pump equipment with the set pressure differential (dPsp) in order to control the reference speed (Wref) to be injected into a control loop of the multi-pump equipment .
    Technical field of the invention
    The present invention relates to a method and a system for controlling multi-pump equipment.
    State of the art
    Multi-pump equipment comprises at least two pumps, each pump being controlled by a variable speed drive to provide a determined flow or pressure. In multi-pump equipment, the pumps are connected in parallel to the same inlet pipe and their outputs meet in a common outlet pipe. For a global setpoint, the equipment pumps are controlled independently. The speed requested from each pump and the number of activated pumps are a function of the global setpoint and possibly of various parameters or input constraints, such as for example electrical energy saving constraints. It is thus understood that, for the same global setpoint, the number of pumps activated and the speed requested from each pump can vary.
    In certain applications such as the heating / ventilation / air conditioning installation control (HVAC), it is advantageous to control the pressure difference between the inlet and the outlet of the multi-pump equipment employed as a function of the required flow rate. The easiest way to do this is to use pressure and flow sensors.
    However, for various reasons, in particular cost, maintenance, ease of installation, it is interesting to do without pressure and flow sensors and to offer solutions for controlling a multi-pump equipment without sensor ( so-called sensorless solutions).
    Sensorless solutions are generally based on checking the head. In these sensorless solutions, even with a constant global setpoint and all identical pumps, there are, however, discontinuities in the flow rate. The reasons for these discontinuities are various:
    A first reason is related to the variable number of pumps that the equipment can activate for the same setpoint. In other words, for the same setpoint, the equipment can choose to activate more or less pumps, activate some and stop others during the pumping process.
    A second reason is related to imbalances between the equipment pumps. Two identical pumps, with the same setpoint, will not necessarily produce the same output flow.
    The object of the invention is therefore to propose a method for controlling a multi-pump equipment, which can solve the drawbacks of the prior art, by overcoming the problems of imbalance between the pumps and the control strategy. individual equipment pumps.
    Statement of the invention
    This object is achieved by a method of controlling a multi-pump equipment intended to pump a fluid, said equipment comprising n pumping cells connected in parallel, with n greater than or equal to 2, and each comprising an inlet, an outlet and a pump connected between the inlet and the outlet, at least one inlet junction point connected to each inlet of the pumping cells and at least one outlet junction point connected to each outlet of the pumping cells, said equipment being controlled from a pressure differential setpoint between said inlet junction point and said outlet junction point, said method consisting in:
    Determine by estimation an estimated pressure differential generated by each pumping cell between its inlet and its outlet taking into account a quadratic correction value representative of the pressure drops in the pumping cell,
    Determine by estimation a pressure differential of the multipump equipment from the pressure differentials estimated for each pumping cell,
    - Compare said estimated pressure differential of the multi-pump equipment to said set pressure differential in order to control the reference speed to be injected into a control loop of the multi-pump equipment.
    According to a particular feature, for each pumping cell, it includes a step of determining the estimated flow rate of the pump from an estimated mechanical power of the pump and a PQ type pump curve at an estimated speed of the pump. .
    According to another particular feature, the method comprises, for each pumping cell, a step of determining an estimated head from the estimated flow rate and an HQ type pump curve at an estimated speed of the pump.
    According to another particular feature, for each pumping cell, the estimated pressure differential of the pumping cell is determined from the estimated head and from said quadratic correction value.
    According to a particular embodiment, the method includes a step of correcting the set pressure differential using a quadratic compensation coefficient.
    According to a first embodiment, the method comprises an initial learning step implemented to determine the quadratic correction value, representative of the pressure losses in the pumping cell, said initial learning step consisting in:
    - Activate each pump of the equipment individually at a determined individual set flow rate,
    - Activate at least two by two, pumps of the equipment at a total set flow identical to said individual set flow,
    Determine a pressure drop compensation coefficient for each pumping cell,
    Determine the quadratic correction value from the pressure drop compensation coefficient.
    According to a second embodiment, the quadratic correction value is determined theoretically from the head that is equivalent to the pressure losses of the pumping cell of the equipment at a given flow rate.
    The invention also relates to a system for controlling a multi-pump equipment intended to pump a fluid, said equipment comprising n pumping cells connected in parallel, with n greater than or equal to 2, and each comprising an inlet, an outlet and a pump connected between the inlet and the outlet, at least one inlet junction point connected to each inlet of the pumping cells and an outlet junction point connected to each outlet of the pumping cells, said equipment being controlled from a pressure differential setpoint between said inlet junction point and said outlet junction point, said system comprising:
    A module for determining by estimating an estimated pressure differential generated by each pumping cell between its input and its output taking into account a quadratic correction value representative of the pressure drops in the pumping cell,
    A module for determining a pressure differential of the multi-pump equipment from the pressure differentials estimated for each pumping cell,
    A module for comparing said estimated pressure differential of the multi-pump equipment to said set pressure differential in order to control the reference speed to be injected into a control loop of the multi-pump equipment.
    According to a particular feature, for each pumping cell, the system includes a block for estimating the estimated flow rate of the pump from an estimated mechanical power of the pump and a PQ type pump curve at an estimated speed of the pump.
    According to another particular feature, the system comprises, for each pumping cell, a block for estimating an estimated head height from the estimated flow rate and an HQ type pump curve at an estimated speed of the pump.
    According to another particularity, for each pumping cell (Ci), the system comprises a block for estimating the estimated pressure differential of the pumping cell is determined from the estimated head and from said quadratic correction value.
    According to a particular embodiment, the system includes a block for correcting the set pressure differential using a quadratic compensation coefficient.
    According to a first embodiment, the system comprises a learning module executed to determine the quadratic correction value, said module comprising:
    A control module for each pump of the equipment individually at a determined individual target flow,
    A control module at least two by two, pumps the equipment at a total set flow identical to said individual set flow,
    A module for determining a pressure drop compensation coefficient for each pumping cell,
    A module for determining the quadratic correction value from the pressure drop compensation coefficient.
    According to a second embodiment, the system includes a module for determining the quadratic correction value from the head that is equivalent to the pressure losses of the pumping cell of the equipment at a given flow rate.
    Brief description of the figures
    Other characteristics and advantages will appear in the following detailed description given with reference to the appended drawings in which:
    Figure 1 shows schematically the architecture of a multi-pump equipment.
    FIG. 2 represents the control architecture of a multi-pump equipment.
    FIGS. 3A to 3C represent three pump curves of the Manometric Height-Flow type applied for controlling a pump and illustrating a mode of controlling the manometric head which is respectively of the constant, proportional and quadratic type.
    FIGS. 4A to 4C represent three HQ type pump curves applied for controlling a pump and illustrating both the principle of control of the invention in pressure difference, of constant, proportional and quadratic type respectively and also the resulting head height curve profile.
    FIG. 5 represents, diagrammatically, an operating diagram of the invention, during a constant type control.
    FIG. 6 schematically represents an operating diagram of the invention, during a quadratic type control.
    FIG. 7 represents an operating diagram illustrating the principle of correction between head and pressure differential.
    Detailed description of at least one embodiment
    The invention applies to multi-pump equipment 1 of fluid, comprising several controlled pumps. Such multi-pump equipment is used in particular for pumping a fluid, for example in heating / ventilation / air conditioning (HVAC) type installations or in water treatment installations.
    With reference to FIG. 1, a multi-pump equipment 1 comprises n pumping cells Ci, with i going from 1 to and n greater than or equal to 2, each pumping cell Ci comprising an input INi, an output OUTi and a pump Pi positioned between the inlet and the outlet to pump a fluid from the inlet to the outlet. In equipment 1, the n pumping cells Ci are connected in parallel, that is to say that the equipment comprises at least one input junction point A to which the inputs of all the cells of pumping and at least one outlet junction point B to which the outputs of all the pumping cells are connected. The multi-pump equipment 1 is thus provided with n branches in parallel, each branch corresponding to a separate pumping cell.
    In FIG. 1, a device 1 with three pumping cells C1, C2, C3 is shown. Of course, the invention can fully apply to equipment comprising at least two pumping cells.
    Each pumping cell Ci furthermore comprises an electric motor, for example included in the pump, and controlled at variable speed by a speed variator VSDi, the speed variator advantageously forming part of the cell Ci. In known manner, a variator of speed controls an electric motor by applying output voltage signals to it, determined by a control loop receiving one or more setpoints as input. The control loop is implemented by a control module executed by a variable speed drive control unit.
    With reference to FIG. 2, the control architecture of an installation (for example of the HVAC type) including such multi-pump equipment 1 is for example the following:
    An installation control module M10 receives one or more input reference setpoints Ref (for example a setpoint temperature) and determines a setpoint pressure differential dPsp.
    The control module M20 of the multi-pump equipment 1 determines the control strategy to be applied to the pumping cells Ci of the equipment and sends a set speed WrefJ to the control module M1 _i of the pump of each pumping cell .
    The pump Pi of each pumping cell Ci is controlled by its speed variator VSDi according to a control loop executed by the control module M1_i of the control unit of the speed variator. Each control module M1_i determines the voltages to be applied at the output to control the pump Pi of the cell Ci, in particular as a function of an individual speed setpoint applied at the input.
    A monitoring module M2_i of the control unit of the variable speed drive VSDi of each pumping cell Ci retrieves operating data of the pump Pi from the control module M1 _i, this data being in particular the mechanical power Pmpi estimated applied at the pump and the estimated speed Wpi applied to the pump Pi. This data is advantageously obtained without the use of speed sensors.
    The M2_i monitoring module of each pumping cell Ci sends calculated data to a monitoring module of the multi-pump equipment 1 at regular intervals, this data being notably the theoretical flow Qpumpi at the outlet of the cell, the head Hpumpi estimated to obtain this flow, the difference in pressure dPpumpi estimated between the inlet and the outlet of the cell.
    The monitoring module M30 of the multi-pump equipment 1 sends to the control module M20 of the multi-pump equipment, an estimated pressure differential dPSys for the multi-pump equipment. .
    The control module M20 of the multi-pump equipment 1 determines the setpoint speed WrefJ to be applied to each pumping cell of the equipment as a function of the estimated pressure differential dPSys and of the setpoint pressure differential dPsp received.
    The control module M20 of the multi-pump equipment and the monitoring module M30 of the multi-pump equipment are for example executed in a central unit UC of a programmable controller or in the control unit of one of the variable speed drives of an equipment pumping cell.
    Likewise, the control module M10 of the installation is for example executed in a central unit UC of a programmable controller, which may be identical to that described above, or in another control unit, such as that of one of the speed variators of an equipment pumping cell.
    According to the invention, the control modules M1_i and monitoring M2_i of the pumping cells and the control module M10 and monitoring M20 of the equipment 1 will be included in a control system allowing the implementation of the control method of the invention.
    In Figure 2, there is shown, without limitation, the control module M10 of the installation, the control module M20 of the multi-pump equipment and the monitoring module M30 of the multi-pump equipment executed by the central unit of a programmable controller, this being dissociated from the control units associated with each VSDi variable speed drive from the pumping cells Ci.
    Generally, the control of a Pi pump is carried out by adjusting its head (called head in English) to the requested flow. For this, the variable speed drive is based on pre-recorded pump curves. In known manner, each pump is defined by a first characteristic pump curve. This curve illustrates the relationship between the head H of the pump and its volume flow Qpumpi at a given speed. The head Hpumpi of the pump is expressed in meters while the volume flow Qpumpi is expressed for example in m 3 / hour. Each pump is also defined by a second pump characteristic curve expressing the relationship between the mechanical power supplied to the pump and the flow rate Q pU m P i at the output of the pump at a given speed.
    For the control of a single pump, it is known to control the head of the pump directly by following a predefined Hctrl control curve, this curve being able to be constant (FIG. 3A), proportional (FIG. 3B) or quadratic ( Figure 3C). Applying this type of control based on the head is not relevant for multi-pump equipment.
    The principle of the invention therefore rests on the application of a pressure difference control to the multi-pump equipment, which amounts to virtually applying a correction to the head of the equipment. This solution makes it possible to take better account of the pressure drops present in each pumping cell of the equipment.
    With reference to FIGS. 5 and 6, the operating principle implemented for this control is described below.
    In each pumping cell Ci, the monitoring module M2_i determines a theoretical pressure differential dPi of its pumping cell Ci. To do this, the monitoring module M2_i performs the following operations:
    It executes a block B1 for estimating the flow rate Qpumpi generated by the pump Pi from the mechanical power Pmpi applied to the pump and the speed Wpi applied to the pump, this mechanical power and this speed preferably being estimated and obtained data. in the pump control loop. For this, it is based on the PQ type pump curve defined above at the speed of the pump.
    - From the flow Qpumpi estimated for the pump, it performs a block of estimation B2 of the head Hpumpi to be applied to obtain this flow. For this, it is based on the HQ curve defined above at the speed of the pump.
    It performs a block for estimating the pressure difference dPpumpi of the pumping cell Ci between the inlet and the outlet of the cell, by applying a quadratic correction value HEGi to the head, this correction taking account in particular of the losses charge in its cell branch.
    These three operations are implemented in parallel by each M2_i monitoring module of the Ci pump cells. The applied quadratic correction value HEGi is distinct for each Ci pump cell. We will see below the principle of determining the value of HEGi quadratic correction to be applied for each pumping cell Ci.
    The monitoring module M30 of the multi-pump equipment 1 is then responsible for recovering the pressure differential values dPpumpi determined for each pumping cell Ci.
    The monitoring module M30 of the equipment 1 executes a block for determining B4 of a pressure differential for the entire multi-pump equipment. This estimated pressure differential of the equipment corresponds to the estimated pressure difference between the inlet junction point A and the outlet junction point B of the equipment. Ideally, the estimation block B4 applies the formula:
    d-Psys ~ dPp U mpi
    In an alternative embodiment, to better take into account certain features of the equipment, the estimation block B4 can also rely on the following expression:
    IT · IT · dPsys ~ (d-Ppumpi Qpumpi)! 0.
    pumpi
    The monitoring module M30 of the equipment then injects the pressure differential dPSys estimated in the control module M20 of the equipment 1, the control module M20 also receiving as input the reference pressure differential dPsp.
    Depending on the control method used, the control loop implemented by the equipment differs.
    With reference to FIG. 5, for a correction of a constant pressure differential control, the control module M20 operates as follows:
    It performs a comparison block B5 between the estimated pressure differential dPSys for the equipment and the set pressure differential dPsp, in order to determine the difference between the two.
    It injects the determined difference into a corrector with proportional integral derivative action (PID) so as to deduce therefrom the setpoint speed Wref of the equipment 1, to make the pressure differential of the equipment converge towards the setpoint pressure differential .
    With reference to FIG. 6, for a correction of a quadratic pressure differential control, the control module M20 operates as follows:
    It executes a setpoint differential pressure correction module. This correction module implements an estimation block B6 of the total flow rate for the equipment 1 from the estimated flow rate Qpumpi obtained by each pumping cell Ci. The estimated total flow rate Qtot is injected into a correction block B7 applying a equipment pressure loss compensation function (FLC for Friction Loss Compensation). The determined correction value is added to the set pressure differential dPsp in order to obtain a corrected set pressure differential dPsp_corr (block B8).
    It performs a comparison block B50 between the estimated pressure differential dPSys for the equipment and the corrected setpoint pressure differential dPsp_corr, in order to determine the difference between the two.
    It injects the determined difference into a proportional integral derivative (PID) corrector so as to deduce therefrom the setpoint speed Wref of the equipment to make the pressure differential of the equipment converge towards the corrected setpoint pressure differential.
    In the two solutions defined above, the equipment speed control module M20 then takes care of determining the set speeds to be applied to each pumping cell Ci and sending them to the control modules of each cell. pumping according to the overall set speed Wref obtained.
    FIG. 7 illustrates the principle of determining the quadratic correction value HEGi to be applied in each pumping cell Ci. This quadratic correction value is determined separately for each pumping cell Ci. The determination method is for example implemented works outside the normal operation of the equipment, for example during a learning stage. It is for example implemented at the level of a particular learning module associated with the multi-pump equipment and for example executed by the central unit of the programmable controller defined above.
    The principle set out below takes account of the fact that the equipment is stable and does not undergo load variations for a given flow rate. The losses in the pipes and in the load will be considered as always the same.
    The first step E1 consists in executing a control module to activate each pump of the multi-pump equipment one after the other. Each pump being controlled at the same set flow rate.
    For each pump activated, the learning module collects the flow rate and head data estimated by the monitoring module of each pumping cell.
    For this first step E1, we thus have:
    // (Hpumpi Qi Qpumpi ~ Qref
    H i = dP Sys + Hfl i (Ql) (1)
    With HACQ 2 ) = Ωί .ρ 2
    With:
    Hi the estimated head for each pumping cell i in the equipment;
    - Qi the estimated flow generated by each pumping cell i of the equipment;
    - Qref the target flow rate requested at the input of each pumping cell;
    Hfli the head height equivalent to the pressure losses of the pumping cell i of the equipment;
    - dPsys, the equipment pressure differential;
    - a, a pressure drop coefficient, which will be explained below;
    The second step E2 consists in executing a control module to actuate the pumps of the equipment two by two, with a set point in total flow identical to the set point rate applied to each pump during the first step.
    For each pump, the learning module collects the flow rate and head data estimated by the monitoring module of each pumping cell.
    For this second step E2, we thus have:
    //// ( - Qpumpi
    QXi = Qpumpi with Σ Q * i ~ Qref HX i = dP Sys + Hfl i (QXj) (2) with H / Zi (ç 2 ) = dj. ç 2
    With:
    HXi the estimated head for each pumping cell i of the equipment during the second step;
    - QXi the estimated flow generated by each pumping cell i of the equipment during this second step;
    In a third step E3, the learning module determines the coefficient a, mentioned above and representative of the pressure drops in each pumping cell. For this, the learning module applies the following reasoning:
    From relations (1) and (2), below, we deduce the expression of the coefficient a ,:
    Ht - HXi = HfliÎQ ) - HfliÎQX ) = Hfl ^ Q - QX )
    Is :
    Hi-HXj
    (3)
    From the coefficient a, obtained at the end of the third step E3, the learning module can then calculate, in a fourth step E4, the HEGi correction to be applied for each pumping cell Ci:
    + HEGxH bep .
    'ump
    From relation (3), we obtain:
    With Hbep and Qbep corresponding respectively to the head and flow of the equipment at the point of maximum efficiency (Best Efficiency Point).
    Then, in a fifth step E5, the learning module can determine the pressure differential of the equipment from the following reasoning:
    From relations (2) and (3) above, we deduce that:
    (4)
    In an alternative embodiment, it is also possible for the learning module to determine the HEGi correction for each pumping cell in the following manner, from the theoretical pressure drops at a given flow rate, for example at the flow rate Qbep corresponding to the flow rate taken at maximum yield point:
    Ppump ~ ^ Pump T HEGxH bep
    Qp 'ump
    Qbep
    And as: Hfli (Q BEP ) corresponds to the pressure drops at the flow rate Q BEP , we obtain:
    HEGi =
    H f liQQbep)
    BEP
    The invention thus has many advantages. It allows centralized control, without having to take into account the individual control of the pumps in the equipment. Control is thus transparent whatever the control strategy adopted. In addition, the solution of the invention makes it possible to ensure control of the equipment pressure differential by taking into account the pressure drops in the various branches of the equipment.
    FIGS. 4A to 4C illustrate the correction applied by means of the dPctrl pressure differential control and the head obtained from this control.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1. A method of controlling a multi-pump equipment (1) intended to pump a fluid, said equipment comprising n pumping cells (Ci) connected in parallel, with n greater than or equal to 2, and each comprising an inlet, a outlet and a pump (Pi) connected between the inlet and the outlet, at least one inlet junction point (A) connected to each inlet of the pumping cells and at least one outlet junction point (B) connected to each output of the pumping cells, said equipment being controlled from a pressure differential setpoint between said inlet junction point and said outlet junction point, said method being characterized in that it consists in:
    Determine by estimation an estimated pressure differential (dPpumpi) generated by each pumping cell (Ci) between its input and its output taking into account a quadratic correction value (HEGi) representative of the pressure losses in the pumping cell,
    Determine by estimation a pressure differential (dPSys) of the multi-pump equipment from the pressure differentials estimated for each pumping cell,
    - Compare said estimated pressure differential (dPSys) of the multi-pump equipment to said set pressure differential (dPsp) in order to control the reference speed (Wref) to be injected into a control loop of the multi-equipment pumps.
    [2" id="c-fr-0002]
    2. Method according to claim 1, characterized in that it comprises, for each pumping cell (Ci), a step of determining the estimated flow rate of the pump from an estimated mechanical power (Pm_pi) of the pump and a PQ type pump curve at an estimated speed (Wpi) of the pump.
    [3" id="c-fr-0003]
    3. Method according to claim 2, characterized in that it comprises, for each pumping cell (Ci), a step of determining a manometric head (Hpumpi) estimated from the estimated flow rate and a pump curve HQ type at an estimated pump speed.
    [4" id="c-fr-0004]
    4. Method according to claim 3, characterized in that, for each pumping cell (Ci), the estimated pressure differential of the pumping cell is determined from the estimated head (Hpimpi) and said correction value quadratic (HEGi).
    [5" id="c-fr-0005]
    5. Method according to one of the preceding claims, characterized in that it comprises a step of correcting the set pressure differential (dPsp) using a quadratic compensation coefficient.
    [6" id="c-fr-0006]
    6. Method according to one of claims 1 to 5, characterized in that it comprises an initial learning step implemented to determine the quadratic correction value (HEGi), representative of the pressure losses in the pumping cell , said initial learning step consisting in:
    - Activate each pump (Pi) of the equipment individually at a determined individual target flow,
    - Activate at least two by two, pumps of the equipment at a total set flow identical to said individual set flow,
    Determine a head loss compensation coefficient (a,) for each pumping cell,
    Determine the quadratic correction value from the pressure drop compensation coefficient (a,).
    [7" id="c-fr-0007]
    7. Method according to one of claims 1 to 5, characterized in that it comprises a step of determining the quadratic correction value (HEGi) from the manometric height equivalent to the pressure losses of the pumping cell of equipment at a given rate.
    [8" id="c-fr-0008]
    8. Control system for multi-pump equipment (1) intended to pump a fluid, said equipment comprising n pumping cells (Ci) connected in parallel, with n greater than or equal to 2, and each comprising an inlet, a outlet and a pump (Pi) connected between the inlet and the outlet, at least one inlet junction point (A) connected to each inlet of the pumping cells and at least one outlet junction point (B) connected to each output of the pumping cells, said equipment being controlled from a pressure differential setpoint between said inlet junction point and said outlet junction point, said system being characterized in that it comprises:
    A module for determining by estimating an estimated pressure differential (dPpumpi) generated by each pumping cell (Ci) between its input and its output taking into account a quadratic correction value (HEGi) representative of the pressure drops in the pumping cell,
    A module for determining a pressure differential (dPSys) of the multi-pump equipment from the pressure differentials estimated for each pumping cell,
    A module for comparing said estimated pressure differential (dPSys) of the multi-pump equipment to said set pressure differential (dPsp) in order to control the reference speed (Wref) to be injected into an equipment control loop multi-pump.
    [9" id="c-fr-0009]
    9. System according to claim 8, characterized in that it comprises, for each pumping cell (Ci), an estimation block (B1) of the estimated flow of the pump from an estimated mechanical power (Pm_pi) of the pump and a PQ type pump curve at an estimated speed (Wpi) of the pump.
    [10" id="c-fr-0010]
    10. System according to claim 9, characterized in that it comprises, for each pumping cell (Ci), an estimation block (B2) of a head (Hpumpi) estimated from the estimated flow and an HQ type pump curve at an estimated pump speed.
    [11" id="c-fr-0011]
    11. System according to claim 10, characterized in that, for each pumping cell (Ci), it comprises an estimation block (B3) of the estimated pressure differential of the pumping cell is determined from the head. (Hpimpi) estimated and of said quadratic correction value (HEGi).
    [12" id="c-fr-0012]
    12. System according to one of claims 8 to 10, characterized in that it comprises a correction block (B7) of the pressure differential (dPsp) setpoint using a quadratic compensation coefficient.
    [13" id="c-fr-0013]
    13. System according to one of claims 8 to 12, characterized in that it comprises a learning module executed to determine the quadratic correction value (HEGi), said learning module comprising:
    A control module for each pump (Pi) of the equipment individually at a determined individual target flow,
    A control module, at least two by two, for the pumps of the equipment at a total setpoint flow identical to said individual setpoint flow,
    A module for determining a pressure drop compensation coefficient (a,) for each pumping cell,
    A module for determining the quadratic correction value from the pressure drop compensation coefficient (a,).
    [14" id="c-fr-0014]
    14. System according to one of claims 8 to 12, characterized in that it comprises a module for determining the quadratic correction value (HEGi) from the head height equivalent to the pressure losses of the pumping cell of equipment at a given rate.
    1/3
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    同族专利:
    公开号 | 公开日
    EP3318761B1|2018-11-07|
    US20180129177A1|2018-05-10|
    ES2709650T3|2019-04-17|
    EP3318761A1|2018-05-09|
    US10571878B2|2020-02-25|
    CN108061029B|2020-12-04|
    CN108061029A|2018-05-22|
    FR3058479B1|2018-11-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0735273A1|1995-03-28|1996-10-02|WILO GmbH|Twin pump with main control system|
    EP2743507A1|2012-12-17|2014-06-18|Schneider Toshiba Inverter Europe SAS|Sensorless control method for a multipump system and multipump system|
    WO2015105832A1|2014-01-07|2015-07-16|Fluid Handling Llc|Variable speed multi-pump application for providing energy saving by calculating and compensating for friction loss using speed reference|
    US8202236B2|2007-12-07|2012-06-19|Wright Therapy Products, Inc.|Methods for enhancing pressure accuracy in a compression pump|
    US8275483B2|2009-07-23|2012-09-25|Siemens Industry, Inc.|Demand flow pumping|
    EP2851100A1|2013-09-20|2015-03-25|Berlin Heart GmbH|Blood pump control system and method for controlling a blood pump|
    CN103629193A|2013-11-22|2014-03-12|江苏兆合电气有限公司|Device and method for controlling multi-pump hydraulic system|
    US9295605B2|2013-12-02|2016-03-29|Wright Therapy Products, Inc.|Methods and systems for auto-calibration of a pneumatic compression device|CN109709855B|2018-12-28|2020-04-10|南京埃斯顿自动化股份有限公司|Control method for mixed flow positioning of bidirectional pump of unidirectional pump|
    EP3816451A1|2019-10-28|2021-05-05|Wilo Se|Method for determining the volume flow of a pump arrangement and corresponding pump arrangement|
    EP3940237A1|2020-07-17|2022-01-19|Grundfos Holding A/S|Multi-pump control system|
    法律状态:
    2017-10-06| PLFP| Fee payment|Year of fee payment: 2 |
    2018-05-11| PLSC| Publication of the preliminary search report|Effective date: 20180511 |
    2018-10-10| PLFP| Fee payment|Year of fee payment: 3 |
    2020-10-16| ST| Notification of lapse|Effective date: 20200910 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1660760A|FR3058479B1|2016-11-08|2016-11-08|METHOD AND SYSTEM FOR CONTROLLING MULTI-PUMPS EQUIPMENT|
    FR1660760|2016-11-08|FR1660760A| FR3058479B1|2016-11-08|2016-11-08|METHOD AND SYSTEM FOR CONTROLLING MULTI-PUMPS EQUIPMENT|
    ES17193842T| ES2709650T3|2016-11-08|2017-09-28|Procedure and control system of a multi-pump system|
    EP17193842.6A| EP3318761B1|2016-11-08|2017-09-28|Method and systems for controlling a mutli-pump system|
    US15/785,473| US10571878B2|2016-11-08|2017-10-17|Method and system for controlling a multi-pump system|
    CN201711007076.7A| CN108061029B|2016-11-08|2017-10-25|Method and system for controlling a multi-pump system|
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